Modifications for recording whether UMA/Crash default state for iOS

chrome/browser/metrics/metrics_reporting_state.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_METRICS_METRICS_REPORTING_STATE_H_
 #define CHROME_BROWSER_METRICS_METRICS_REPORTING_STATE_H_
 
 #include "base/callback.h"
 #include "components/metrics/metrics_service_client.h"
 
 typedef base::Callback<void(bool)> OnMetricsReportingCallbackType;
 
 class PrefService;
 class PrefRegistrySimple;
 
 // Initiates a change to metrics reporting state to the new value of |enabled|.
 // Starts or stops the metrics service based on the new state and then runs
 // |callback_fn| (which can be null) with the updated state (as the operation
 // may fail). On platforms other than CrOS and Android, also updates the
 // underlying pref.
 // TODO(gayane): Support setting the pref on all platforms.
 void InitiateMetricsReportingChange(
     bool enabled,
     const OnMetricsReportingCallbackType& callback_fn);
 
 // Returns whether MetricsReporting can be modified by the user (except
 // Android).
 bool IsMetricsReportingPolicyManaged();
 
-// Register prefs relating to metrics reporting state. Currently only registers
-// a pref for metrics reporting default opt-in state.
-void RegisterMetricsReportingStatePrefs(PrefRegistrySimple* registry);
-
-// Sets whether metrics reporting was opt-in or not. If it was opt-in, then the
-// enable checkbox on first-run was default unchecked. If it was opt-out, then
-// the checkbox was default checked. This should only be set once, and only
-// during first-run.
-void RecordMetricsReportingDefaultOptIn(PrefService* local_state, bool opt_in);
-
-// Gets information about the default value for the enable metrics reporting
-// checkbox shown during first-run.
-metrics::MetricsServiceClient::EnableMetricsDefault
-GetMetricsReportingDefaultOptIn(PrefService* local_state);
-
 // Initialize kMetricsReportingEnabled based on kStatsReportingPref device
 // setting and add an observer as it is the source of truth on Chrome OS.
 void SetupMetricsStateForChromeOS();
 
 #endif  // CHROME_BROWSER_METRICS_METRICS_REPORTING_STATE_H_